Matt pointed out that two knife armed fellas circling each other was an extremely rare thing.. or a sight most likely to be seen at a theater. Most guys find out they are in a knife fight after they have been stabbed.
This seems to be quite true. Attacks against unarmed people are the same. The attack is committed and strong, without faking. Also, while I admire the work that the Army folks are doing, going to the ground, especially when there are multiple attackers involved, is not wise, or at least I have serious reservations about it. However, I agree with Mike that you should know what to do at grips range and on the ground because you can certainly end up there.
Here is a true story of an encounter a kenpo friend of mine had in June in a grocery store parking lot.
Carl (not his real name) was attacked by two armed men in a grocery store parking lot. The attack occurred about 2 a.m. He was wheeling his shopping cart out to his car when he saw two men trying to break into it. When he reached the car, one of the men lunged at him and tried to stab him with a screw driver (rather like a rondel thrust, don't you think?). The attacker launched the attack when Carl was about 8 feet away. The attack was made on the pass, right hand holding the weapon, right leg leading at the culmination of the blow. The target was the abdomen.
Carl responded by stepping slightly to the left and parrying to the right with the back of his right hand. He then grasped the attacker’s wrist and struck the attacker on the elbow with his left palm heel. The blow bent the attacker’s arm sharply at an unnatural angle. Carl then kicked him in the groin. The attacker went immediately to the ground.
In the meantime, the other man came around the first attacker and launched an attack of his own, an overhand clubbing attack. Carl met this attack with a right rising block/parry and a right front kick to the ribs. This attacker also fell immediately, incapacitated. That was the end of the encounter.
Carl’s comment to me was that during the first attack he thought, “This is just like in class.”
Both techniques were drawn from pairs routines taught in Parker kenpo and were executed exactly as taught, although quite a number of follow up moves were left out. In the first attack that was because there wasn’t time for them, since the second man was already on the move, nor in fact were they necessary. In the second case, there was no need for them since the second attacker collapsed after the kick.
One interesting point here is that these responses are not practiced in sparing because of the obvious danger involved to the participants. They were/are both practiced in paired partner drills. These drills start slow as the participants become familiar with the technique, but can be quite hard and fast as they gain experience. Despite lack of sparing experience with these techniques, Carl was able to use them in combat when he needed them. (I don't mean to suggest that sparring is not useful.)